Location

The C8 nerve root can be evaluated by testing sensation on the volar aspect of the little finger.

Significance

Loss of sensation should be correlated to the motor exam; in this case finger flexion.
http://www.orthopaedia.com/display/Main/C-8+Motor–Flexor+Digitorum+Superficialis

Sensory loss involving a more diffuse area, overlapping several dermatomes suggests a peripheral nerve injury.

The most sensitive way of assessing sensory loss is using two-point discrimination.

Figures

Attachments:


c8.JPG (image/jpeg)